State Water Resources Research Institute Program

Project Id: 2010UT146B
Title: Developing a Priority System for Managing Sediment in Smaller Reservoirs
Project Type: Research
Start Date: 3/01/2010
End Date: 2/28/2011
Congressional District: UT3
Focus Categories: Sediments, Treatment, Water Quality
Keywords: Sediment management, Reservoirs
Principal Investigators: Hotchkiss, Rollin
Federal Funds: $ 20,000
Non-Federal Matching Funds: $ 49,757
Abstract: Water storage in Utah reservoirs has been declining due to reservoir sedimentation since the original construction of the dams that provided the storage. Many of the more than 100 reservoirs in Utah of more than 1,000 acre-ft are now approaching their design life of 50 years and require bathymetric surveys to determine the extent of storage loss. It is not possible to perform regular bathymetric surveys on all of these reservoirs due to time and cost constraints. Working with the Utah Division of Water Resources and using information from some of the facilities for which sedimentation rates are known, an empirical equation will be developed to predict the extent of sedimentation in the reservoirs where no survey has been performed. Likely inputs to the predictive equation include variables describing the local climate, geology, watershed, dam, and reservoir. The relationship will be verified using the remainder of the reservoirs for which sedimentation rates are known and will be checked by performing a bathymetric survey on a selected reservoir. The process developed in this project can be replicated nationwide.

Progress/Completion Report, 2010, PDF

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